Rapid start-up and stable maintenance of partial nitrification-anaerobic ammonium oxidation treatment of landfill leachate at low temperatures
Rapid start-up and stable maintenance of partial nitrification-anaerobic ammonium oxidation treatment of landfill leachate at low temperatures
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低温部分硝化-厌氧氨氧化处理垃圾渗滤液的快速启动与稳定维持
DOI：
10.1016/j.envres.2020.110131
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发表时间：
2020
影响因子：
8.3
通讯作者：
Yongzhen Peng
中科院分区：
文献类型：
--
作者：
Lina Wu（吴莉娜）;Zhibin Yan;Shan Huang;Jin Li;Baiyi Su;Chunyan Wang;Yongzhen Peng
目前厌氧氨氧化（anammox）处理垃圾渗滤液的研究主要集中在30-35℃的温度范围。然而，在较低温度下实现和维持厌氧氨氧化将扩大其在垃圾渗滤液处理中的应用。本研究试图通过使用包括上流式厌氧污泥床（UASB）、缺氧/好氧（A/O）反应器、厌氧氨氧化反应器（ANAOR）和厌氧序批式反应器（ASBR）的组合工艺来富集厌氧氨氧化来解决这个问题 细菌在相对较低的温度下。垃圾渗滤液处理的部分硝化-厌氧氨氧化工艺实现了快速启动并维持在13-22℃。实验分为第一阶段（20-22℃）和第二阶段（13-15℃）。结果表明，化学需氧量（COD）87.1%、铵态氮（NH4+-N）97.4%~97.7%、总氮（TN）93.3%~94.7%被去除。在第 1 阶段和第 2 阶段，厌氧氨氧化分别去除了至少 29.3% 和 11.4% 的 NH4+-N，NO2 - -N 累积比率为 86.1%~88.6%。 Candidatus Kuenenia 是厌氧氨氧化过程中的优势厌氧氨氧化细菌。 13-15℃的低温不会影响氨氧化细菌（AOB），它们在A/O反应器中的相对丰度为27.29%至33.22%。
The current research regarding anaerobic ammonium oxidation (anammox) for the treatment of landfill leachate mainly focuses on a temperature range of 30–35 ◦C. However, achieving and maintaining anammox at lower temperatures would widen its application for the treatment of landfill leachate.This study, attempts to address this issue by using a combined process involving an upflow anaerobic sludge blanket (UASB), anoxic/oxic (A/O) reactor,.anammox reactor (ANAOR), and anaerobic sequencing batch reactor (ASBR) to enrich anammox bacteria at relatively low temperatures. The rapid start-up of the partial nitrification–anammox process for landfill leachate treatment was achieved and maintained at 13–22 ◦C. The experiment was divided into phase 1 (20–22 ◦C) and phase 2 (13–15 ◦C). The results showed that 87.1% of the chemical oxygen demand (COD), 97.4–97.7% of the ammonium nitrogen (NH4+-N), and 93.3–94.7% of the total nitrogen (TN), were removed. At least 29.3% and 11.4% of NH4+-N was removed through anammox in phases 1 and 2, respectively, with an accumulation NO2 - -N ratio of 86.1–88.6%. Candidatus Kuenenia was the dominant anammox bacteria in the anammox process. A low temperature of 13–15 ◦C did not affect ammonia oxidizing bacteria (AOB), and their relative abundance in the A/O reactor ranged from 27.29% to 33.22%.